TW202411015A - Magnetic edge finder including a top base, a bottom base, at least one alignment cylinder and a detection rod - Google Patents

Abstract

A magnetic edge finder includes a top base, a bottom base, at least one alignment cylinder and a detection rod. The top base has a first face. The top base includes a first magnetic member disposed on the first face. The bottom base has a second face. One of the first face and the second face has at least one alignment groove and the other one has at least one alignment member corresponding to the at least one alignment groove. The bottom base includes a second magnetic member disposed on the second face. When the at least one alignment cylinder is accommodated in the first groove and the top base and the bottom base are engaged by means of magnetic attraction of the first magnetic member and the second magnetic member, the at least one alignment member abuts against the at least one alignment cylinder accommodated in the at least one alignment groove in a point-contact manner, and the at least one alignment member is partially accommodated in the second groove.

Description

Magnetic edge finder

The present invention relates to a measuring device for a machine tool, and in particular to a magnetic edge finder.

It is known that when using various types of machine tools, an edge finder is often needed to confirm the position of the workpiece to be processed or to measure the size of the workpiece to be processed, thereby ensuring the precision of the processing. The commonly used edge finder includes a base and a probe rod, the probe rod is installed on the base, and the probe rod is used to contact the workpiece to be processed to obtain the position of the workpiece to be processed.

However, when the contact force between the probe rod and the workpiece to be processed is too large, the probe rod is prone to bending, which affects the accuracy of measurement. In addition, when the contact force between the probe rod and the workpiece to be processed is too large and the probe rod is separated from the base, the user can reinstall the probe rod on the base, but after the probe rod is reinstalled on the base, the position of the probe rod must be recalibrated, which will cause the processing time to be extended and thus affect the processing rate. Therefore, the commonly used edge finder still needs to be improved.

In view of this, the purpose of the present invention is to provide a magnetic edge finder that can prevent the detection rod from bending when the contact force between the detection rod and the workpiece to be processed is too large, and can improve the efficiency of installation and positioning of the detection rod and improve measurement accuracy.

In order to achieve the above-mentioned purpose, the present invention provides a magnetic edge finder including a top seat, a base, at least one alignment cylinder and a detection rod, the top seat having a first surface, the top seat including a first magnetic member arranged on the first surface; the base having a second surface, one of the first surface and the second surface having at least one alignment groove, the other having at least one alignment member corresponding to the at least one alignment groove, the at least one alignment groove having a first groove and a second groove, the first groove having a first groove section, a second groove section and a third groove section connected in sequence, the first groove being connected to the second groove at the second groove section, the base including a second magnetic member arranged on the second surface; the at least one alignment cylinder is accommodated in the first groove, and the outer walls of the at least one alignment cylinder at opposite ends are respectively tightly matched with the first groove section and the third groove section. The at least one aligning cylinder is engaged with the at least one aligning groove, a gap is formed between one side of the at least one aligning cylinder and the groove wall of the second groove section, and the other side opposite thereto is located at the connection between the second groove section and the second groove; and one end of the detection rod is fixedly connected to the base, and the other end extends away from the base; wherein, when the top seat and the base are engaged through the magnetic attraction of the first magnetic member and the second magnetic member, the first surface and the second surface face each other, the at least one aligning member and the at least one aligning cylinder accommodated in the at least one aligning groove are in point contact with each other, and a portion of the at least one aligning member is accommodated in the second groove.

When the top seat and the base are joined by the magnetic attraction between the first magnetic member and the second magnetic member, the first magnetic member and the second magnetic member do not contact each other, and there is a distance between the first magnetic member and the second magnetic member.

The at least one alignment groove has a first reference axis and a second reference axis located on the first surface and perpendicular to each other, the first groove section, the second groove section and the third groove section are arranged in sequence in the direction of the first reference axis, and the first groove and the second groove are arranged in sequence in the direction of the second reference axis.

The second groove section has a groove wall groove formed by the groove wall, and there is a gap between the groove bottom of the groove wall groove and the at least one alignment cylinder. The distance between the groove bottom of the groove wall groove and the at least one alignment cylinder in the direction of the second reference axis is 0.4~0.6mm.

The at least one cylinder includes two alignment cylinders, the at least one alignment groove has another first groove, the first groove, the second groove and the other first groove are arranged in sequence in the direction of the second reference axis, each alignment cylinder is respectively accommodated in the first groove and the other first groove, and the at least one alignment member is respectively abutted with the two alignment cylinders accommodated in the at least one alignment groove in a point contact manner.

The at least one counter-column is made of tungsten steel.

The number of the at least one alignment groove and the at least one alignment member is three respectively, and the alignment grooves and the alignment members are arranged in a non-collinear manner.

The alignment grooves and the alignment parts are arranged around the first magnetic part and the second magnetic part, and the first magnetic part and the second magnetic part are respectively located at the centers of the alignment grooves and the alignment parts.

One of the first surface and the second surface has a positioning groove, and the other has a positioning piece corresponding to the positioning groove.

The magnetic edge finder includes a dustproof ring, which is arranged in a manner of surrounding the joint between the top seat and the base.

The effect of the present invention is that the top seat and the base are joined by the magnetic attraction between the first magnetic member and the second magnetic member, whereby when the contact force between the detection rod and the workpiece to be processed is too large, the base and the top seat can be separated from each other, thereby achieving the purpose of avoiding the detection rod from bending; and through the mutual cooperation between the at least one alignment member and the at least one alignment groove, the efficiency of the installation and positioning of the detection rod can be improved; in addition, through the design that there is a gap between one side of the at least one alignment cylinder and the groove wall of the second groove section, and the other side opposite is located at the connection between the second groove section and the second groove, it can be avoided that the at least one alignment cylinder is unnecessary deformed or bent when installing the at least one alignment cylinder, thereby improving the accuracy of positioning between the top seat and the base, thereby achieving the purpose of improving the measurement accuracy.

In order to explain the present invention more clearly, a preferred embodiment is given and described in detail with reference to the drawings. Please refer to Figures 1 to 11, which are a magnetic edge finder 1 of a preferred embodiment of the present invention. In this embodiment, the magnetic edge finder 1 is applied to an EDM processing area to confirm the position of a workpiece to be processed or to measure the size of the workpiece to be processed.

As shown in FIG. 2 and FIG. 3 , the magnetic edge finder 1 includes a top base 10, a base 20 and a probe rod 30. The top base 10 has a first surface 101, and the top base 10 includes a first magnetic member 12 disposed on the first surface 101. The base 20 has a second surface 201, and the base 20 includes a second magnetic member 22 disposed on the second surface 201. One end of the probe rod 30 is fixedly connected to the base 20, and the other end is away from the base 20. The probe rod 30 extends in a direction to contact the workpiece to be processed. The top seat 10 and the base 20 can be engaged through the magnetic attraction between the first magnetic member 12 and the second magnetic member 22, and the top seat 10 and the base 20 can be separated from each other through an external force. Thus, when the contact force between the probe rod 30 and the workpiece to be processed is too large, the base 20 and the top seat 10 can be separated from each other, thereby achieving the purpose of preventing the probe rod 30 from bending due to collision.

In the present embodiment, the first magnetic member 12 is made of aluminum nickel cobalt magnet, which is generally known as a strong magnet, and the second magnetic member 22 is made of steel as an example. In practice, the first magnetic member 12 and the second magnetic member 22 can be made of materials that both have magnetic force, or either of the first magnetic member 12 and the second magnetic member 22 has magnetic force, while the other is made of a material that can be attracted by magnetic force. In this way, the top seat 10 and the base 20 can be joined by magnetic force and the aforementioned purpose of preventing the detection rod 30 from bending and deforming can be achieved.

Referring to FIG. 4 , the first surface 101 has three alignment grooves 14, which are arranged in a non-collinear manner and surround the first magnetic member 12, and the first magnetic member 12 is located at the center surrounded by the alignment grooves 14. Each alignment groove 14 has two first grooves 141 and a second groove 142 formed by concavely forming the first surface 101. The two first grooves 141 have the same structure, wherein one first groove 141 is located on one side of the second groove 142, and the other first groove 141' is located on the On the opposite side of the second groove 142, each of the first grooves 141 has a first groove section 141a, a second groove section 141b and a third groove section 141c connected in sequence, and each of the first grooves 141 is connected to the second groove 142 at the second groove section 141b. Each of the other first grooves 141' also has a first groove section 141'a, a second groove section 141'b and a third groove section 141'c connected in sequence, and each of the other first grooves 141' is connected to the second groove 142 at the second groove section 141'b.

To further illustrate, each alignment groove 14 has a first reference axis AX and a second reference axis AY located on the first surface 101 and perpendicular to each other, the first groove section 141a, the second groove section 141b and the third groove section 141c of each first groove 141 are arranged in sequence in the direction of the first reference axis AX, and the first groove 141, the second groove 142 and another first groove 141' are arranged in sequence in the direction of the second reference axis AY.

The magnetic edge finder 1 includes two alignment cylinders 16 accommodated in each alignment groove 14, wherein one alignment cylinder 16 is arranged in the first groove 141, and the other alignment cylinder 16 is arranged in the other first groove 141', each alignment cylinder 16 has a long side extending along the first reference axis AX direction, and the outer walls of each alignment cylinder 16 at the opposite ends along the first reference axis AX direction are tightly matched with the first groove section 141a and the third groove section 141c of each first groove 141, respectively, thereby, each alignment cylinder 16 can be stably accommodated in each first groove 141 without generating relative movement with each first groove 141, wherein each alignment cylinder 16 is made of tungsten steel and has the characteristics of wear resistance and low magnetism.

As shown in FIG. 6 , a gap G is provided between one side of each alignment cylinder 16 and the groove wall of the second groove section 141b of each first groove 141. The other side of each alignment cylinder 16 is located at the connecting portion 142a between the second groove section 141b and the second groove 142. The second groove section 141b of each first groove 141 has a groove wall groove 143 formed by concavely forming the groove wall. The groove bottom of the groove wall groove 143 is connected to the groove bottom of the groove wall 143. There is a gap G between the alignment cylinders 16, and the distance L between the bottom of the groove wall groove 143 and the alignment cylinder 16 in the direction of the second reference axis AY is 0.4~0.6mm; preferably, the width W1 of the groove wall groove 143 in the direction of the first reference axis AX is equal to the opening width W2 of the connecting point 142a of the second groove section 141b and the second groove 142 in the direction of the first reference axis AX.

In this way, when each alignment cylinder 16 is accommodated in each first groove 141, each alignment cylinder 16 can be subjected to symmetrical clamping and squeezing force in the direction of the first reference axis AX, thereby avoiding unnecessary deformation or bending of each alignment cylinder 16 due to uneven force. For example, if the groove wall groove 143 is not provided in each first groove 141, when each alignment cylinder is accommodated in each first groove, one side of each alignment cylinder is easily squeezed by the groove wall of the second groove section, causing the alignment cylinder to bend and deform toward the connection between the second groove section and the second groove, thereby affecting the accuracy of subsequent alignment.

Referring to FIG. 5 , the second surface 201 has three alignment members 24 arranged corresponding to the alignment grooves 14. The alignment members 24 are arranged in a non-collinear manner and surround the second magnetic member 22. The second magnetic member 22 is located at the center of the alignment members 24. Each alignment member 24 is a spherical protrusion formed from the second surface 201. When the first surface 101 faces the second surface 201, and the top seat 1 0 is coupled to the base 20 by magnetic force, each alignment member 24 abuts against the alignment cylinder 16 accommodated in each alignment groove 14 in a point contact manner as shown in FIG. 11, and a portion of each alignment member 24 is accommodated in the second groove 142, that is, each alignment member abuts against two alignment cylinders 16 in a point contact manner, thereby improving the positioning accuracy between the top seat 10 and the base 20, thereby achieving the purpose of improving the measurement accuracy.

Please refer to Figures 8 and 9. When the top seat 10 and the base 20 are joined by the magnetic attraction between the first magnetic member 12 and the second magnetic member 22, the first surface 101 does not contact the second surface 201 through the abutment of the alignment members 24 with the two alignment cylinders 16 respectively, and the first magnetic member 12 and the second magnetic member 22 have a distance T without contacting each other. In this way, the top seat 10 and the base 20 can be smoothly separated from each other when subjected to external force.

In this embodiment, the first surface 101 is provided with the alignment groove 14, and the second surface 201 is provided with the alignment member 24 as an example for explanation. In practice, the second surface 201 may also be provided with the alignment groove 14, and the first surface 101 may be provided with the alignment member 24. Furthermore, in this embodiment, the number of the alignment groove 14 and the alignment member 24 is respectively provided with three as an example for explanation. In other embodiments, the alignment groove and the alignment member 24 may be provided with three or more. The number of alignment grooves 14 is one, two or more than three. In addition, in the present embodiment, each alignment groove 14 is illustrated by an example in which a first groove 141 is respectively provided on both sides of a second groove 142, and an alignment cylinder 16 is respectively accommodated in the two first grooves 141. In other embodiments, it is not excluded that each alignment groove is only provided with one first groove and one second groove, and one alignment cylinder is accommodated in one first groove.

Referring to FIG. 2 and FIG. 3, the first surface 101 has a positioning groove 18 formed inwardly from the first surface 101, and the second surface 201 has a positioning member 26 formed outwardly from the second surface 201 corresponding to the positioning groove 18. The positioning groove 18 is arranged at a non-center of the second surface 201. When the top seat 10 and the base 20 are joined by the magnetic attraction of the first magnetic member 12 and the second magnetic member 22, the user needs to adjust the top seat 10 and the base 20 until the positioning member 26 and the second magnetic member 22 are aligned. The matching position of the positioning grooves 18 can make each alignment member 24 be located against the alignment cylinder 16 in each alignment groove 14, so as to achieve the purpose of positioning and improve the accuracy of positioning between the top and the base, thereby achieving the purpose of improving the measurement accuracy. It should be noted that, in practice, the positioning member 26 can be set on the first surface and the positioning grooves 18 can be set on the second surface 201, and the positioning effect can also be achieved. In addition, the number of positioning members 26 and positioning grooves 18 can be set correspondingly to more than one.

For example, although the alignment grooves 14 are components of the same design, the alignment members 24 are components of the same design, and the alignment cylinders 16 are components of the same design, there may be processing errors between the components. That is, when one of the alignment members 24 is accommodated in one alignment groove 14 and when it is accommodated in another alignment groove 14, the probe rod may be located at a different position. In this case, it is necessary to The position of the probe rod 30 needs to be recalibrated, and the present invention can ensure that when the top seat 10 and the base 20 are re-engaged after being separated from each other, the engagement method can be completely consistent with the engagement method before being separated from each other through the cooperation of the positioning member 26 and the positioning groove 18. Therefore, after the top seat 10 and the base 20 are re-engaged, it is unnecessary to recalibrate the position of the probe rod 30, thereby achieving the effect of improving processing efficiency.

Please refer to Figure 8. The magnetic edge finder 1 includes a dustproof ring 40, which is arranged to surround the joint between the top seat 10 and the base 20. In this embodiment, one side of the dustproof ring 40 is fixed to the top seat 10. When the top seat 10 and the base 20 are engaged with each other, the other side of the dustproof ring 40 is tightly engaged with the base, thereby preventing impurities and debris in the environment from entering between the first surface 101 and the second surface 201.

In summary, the effect of the present invention is that the top seat 10 and the base 20 are joined by the magnetic attraction of the first magnetic member 12 and the second magnetic member 22, so that when the contact force between the probe rod 30 and the workpiece to be processed is too large, the base 20 and the top seat 10 can be separated from each other, thereby achieving the purpose of preventing the probe rod 30 from bending and deforming; and through the mutual cooperation of the at least one alignment member 24 and the at least one alignment groove 14, the installation and positioning effect of the probe rod 30 can be achieved. rate; in addition, by providing the gap G between one side of the at least one alignment cylinder 16 and the groove wall of the second groove section 141b, the design that the other side of the at least one alignment cylinder 16 is located at the connecting portion 142a between the second groove section 141b and the second groove 142 can avoid unnecessary deformation or bending of the at least one alignment cylinder 16 when installing the at least one alignment cylinder 16, thereby improving the positioning accuracy between the top seat 10 and the base 20, thereby achieving the purpose of improving the measurement accuracy.

The above description is only the preferred embodiment of the present invention. Any equivalent changes made by applying the present invention specification and the scope of patent application should be included in the patent scope of the present invention.

[The present invention] 1: Magnetic edge finder 10: Top seat 101: First surface 12: First magnetic member 141,141': First groove 141a,141'a: First groove section 141b,141'b: Second groove section 141c,141'c: Third groove section 142: Second groove 142a: Connection 14: Alignment groove 16: Alignment cylinder 18: Positioning groove 20: Base 201: Second surface 22: Second magnetic member 24: Alignment member 26: Positioning member 30: Probe rod 40: Dustproof ring AX: First reference axis AY: Second reference axis G: Gap L: Distance W1,W2: Width T: Distance

FIG. 1 is a three-dimensional diagram of a magnetic edge finder of a preferred embodiment of the present invention. FIG. 2 is a schematic diagram of a decomposed magnetic edge finder of the preferred embodiment. FIG. 3 is a schematic diagram of another angle decomposed magnetic edge finder of the preferred embodiment. FIG. 4 is a schematic diagram of a top view of the top seat of the magnetic edge finder of the preferred embodiment. FIG. 5 is a schematic diagram of a top view of the base of the magnetic edge finder of the preferred embodiment. FIG. 6 is an enlarged schematic diagram of some components of FIG. 4. FIG. 7 is a schematic diagram of a side view of the magnetic edge finder of the preferred embodiment. FIG. 8 is a schematic diagram of a cross-section in the A-A direction of FIG. 6. FIG. 9 is a schematic diagram of a cross-section in the B-B direction of FIG. 6. FIG. 11 is a schematic diagram of a cross-section in the B-B direction of FIG. 10.

10: Top seat

20: Base

201: Second side

22: Second magnetic part

24: Alignment parts

26: Positioning piece

30: Probe rod

40: Dustproof ring

Claims (10)

A magnetic edge finder, comprising: A top seat, having a first surface, the top seat comprising a first magnetic member disposed on the first surface; A base, having a second surface, the base comprising a second magnetic member disposed on the second surface, one of the first surface and the second surface having at least one alignment groove, the other having at least one alignment member corresponding to the at least one alignment groove, the at least one alignment groove having a first groove and a second groove, the first groove having a first groove section, a second groove section and a third groove section connected in sequence, the first groove being connected to the second groove at the second groove section; At least one alignment cylinder is accommodated in the first groove of the at least one alignment groove, the outer walls of the at least one alignment cylinder at opposite ends are respectively tightly matched with the first groove section and the third groove section, a gap is formed between one side of the at least one alignment cylinder and the groove wall of the second groove section, and the other side opposite to the at least one alignment cylinder is located at the connection between the second groove section and the second groove; and a probe rod, one end of which is fixed to the base and the other end extends away from the base; wherein, when the top seat and the base are engaged through the magnetic attraction of the first magnetic member and the second magnetic member, the first surface faces the second surface, the at least one alignment member and the at least one alignment cylinder accommodated in the at least one alignment groove are in point contact, and part of the at least one alignment member is accommodated in the second groove. A magnetic edge finder as described in claim 1, wherein when the top and the base are joined by magnetic attraction between the first magnetic member and the second magnetic member, the first magnetic member and the second magnetic member are not in contact with each other, and there is a distance between the first magnetic member and the second magnetic member. A magnetic edge finder as described in claim 1, wherein the at least one alignment slot has a first reference axis and a second reference axis located on the first surface and perpendicular to each other, the first slot segment, the second slot segment and the third slot segment are arranged in sequence in the direction of the first reference axis, and the first slot and the second slot are arranged in sequence in the direction of the second reference axis. A magnetic edge finder as described in claim 3, wherein the second groove section has a groove wall groove formed inwardly from the groove wall, and there is a gap between the groove bottom of the groove wall groove and the at least one alignment cylinder, and the distance between the groove bottom of the groove wall groove and the at least one alignment cylinder in the direction of the second reference axis is 0.4~0.6mm. As described in claim 3, the magnetic edge finder, the at least one cylinder includes two alignment cylinders, the at least one alignment groove has another first groove, the first groove, the second groove and the other first groove are arranged in sequence in the direction of the second reference axis, each of the alignment cylinders is respectively accommodated in the first groove and the other first groove, and the at least one alignment member is respectively abutted with the two alignment cylinders accommodated in the at least one alignment groove in a point contact manner. A magnetic edge finder as described in claim 1, wherein at least one of the alignment cylinders is made of tungsten steel. A magnetic edge finder as described in claim 1, wherein the number of the at least one alignment slot and the at least one alignment member are three respectively, and the alignment slots and the alignment members are arranged in a non-collinear manner. A magnetic edge finder as described in claim 7, wherein the alignment grooves and the alignment members are arranged around the first magnetic member and the second magnetic member, and the first magnetic member and the second magnetic member are respectively located at the centers of the alignment grooves and the alignment members. A magnetic edge finder as described in claim 1, wherein one of the first surface and the second surface has a positioning groove, and the other has a positioning piece corresponding to the positioning groove. The magnetic edge finder as described in claim 1 includes a dustproof ring, which is arranged to surround the joint between the top seat and the base.

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